Chris has since deleted the tweets (damage control!!), and a source close to Chris says that he denies writing the tweets:

"Chris didn't Tweet that, someone does his postings to Twitter and when he saw that he ordered it taken down immediately."

Suuuuure….

But we're not taking it lightly and neither is Momma Joyce. An insider says:

"Joyce is absolutely livid that those vile words and rants were posted on Chris' Twitter page. She isn't buying his excuse that he didn't post it. She has told him repeatedly that it is his Twitter, only he should be posting to it, period. She feels like people were just waiting for a negative reaction."

She had begged Chris to just ignore it and now that he didn't listen, she is just beside herself that after such successful performance at the Grammys and winning the award, people are now talking about this Twitter controversy.

It's time for Chris to grow up, and his mother told him that. Chris is his own worst enemy and she constantly worries about how he reacts to stress."

We know he's a grown man, but it's time for his mom to step in. He's needs a stern lecture and we have a feeling his mother is the only one who can get through to him.